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# Triangle Proportionality Theorems Exploration

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Common Core Standards
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This exploration demonstrates the triangle proportionality theorems:
- When an angle of a triangle is bisected, the third side is divided proportionally to the sides creating the angle.
- A line parallel to one side of a triangle divides the other two sides proportionally.
G.GPE.7, G.SRT.4, G.SRT.5
G.GPE Expressing Geometric Properties with
Equations
Use coordinates to prove simple geometric
theorems algebraically
7. Use coordinates to compute perimeters
of polygons and areas of triangles
and rectangles, e.g., using the
distance formula.
G.SRT Similarity, Right Triangles, and
Trigonometry
Prove theorems involving similarity
5. Use congruence and similarity criteria for
triangles to solve problems and to prove
relationships in geometric figures.
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